Title: AdaoSol's Replies | WordPress.org

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# AdaoSol

  [  ](https://wordpress.org/support/users/adaosol/)

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 *   [Reviews Written](https://wordpress.org/support/users/adaosol/reviews/)
 *   [Topics Replied To](https://wordpress.org/support/users/adaosol/replied-to/)
 *   [Engagements](https://wordpress.org/support/users/adaosol/engagements/)
 *   [Favorites](https://wordpress.org/support/users/adaosol/favorites/)

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## Forum Replies Created

Viewing 2 replies - 1 through 2 (of 2 total)

 *   Forum: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
   
   In reply to: [RSS Feed Not Validating](https://wordpress.org/support/topic/rss-feed-not-validating-5/)
 *  Thread Starter [AdaoSol](https://wordpress.org/support/users/adaosol/)
 * (@adaosol)
 * [15 years, 7 months ago](https://wordpress.org/support/topic/rss-feed-not-validating-5/#post-1712944)
 * OK, I found out what’s wrong!!
 * I’ve tried a couple of things to isolate the problem:
    -Deactivated all plugins
   => same error message -Switched from Thesis to the default theme => no error 
   message! -Reactivated all plugins while using the default theme => still no error
   message -Switched back to Thesis => old error message back again => something
   in Thesis causes the problem
 * I then made a backup of the custom.css and custom_functions.php files. Next, 
   I deleted the entire code in both files (in the custom file editor). => error
   message gone!!
 * I experimented with the code of both files (deleting parts of it here and there
   to find out what caused the problem) and figured out that there was something
   in custom_functions.php file. In the first line, there it was: “?<?php”. Deleted
   the first question mark and everything is running smoothly now. Don’t know if
   the first question mark was there from the beginning or if it somehow slipped
   in there, but that was the little bug that caused the mess…
 * Thanks for your support,
    Tom
 *   Forum: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
   
   In reply to: [RSS Feed Not Validating](https://wordpress.org/support/topic/rss-feed-not-validating-5/)
 *  Thread Starter [AdaoSol](https://wordpress.org/support/users/adaosol/)
 * (@adaosol)
 * [15 years, 7 months ago](https://wordpress.org/support/topic/rss-feed-not-validating-5/#post-1712940)
 * Thank you, Esmi!
 * I deactivated all plugins: same error message.
    I switched the theme (from Thesis
   to default): no error message. I activated all plugins while using the default
   theme: still no error message. I switched back to Thesis: back to the same old
   problem…
 * Has any Thesis user had the same problem?
 * Cheers,
    Tom

Viewing 2 replies - 1 through 2 (of 2 total)